考虑可靠性成本的配电网多阶段扩展规划方法

Multi-stage expansion planning method for distribution network considering reliability cost

传统的配电网可靠性评估通过模拟组件中断来量化一组事件对供电可靠性的影响,这种基于模拟的可靠性评估方法使得其纳入到配电网扩展规划中需要采用启发式或元启发式方法求解。为了克服启发式或元启发式方法收敛性和局部最优的缺点,文中提出了考虑可靠性成本的配电网多阶段扩展规划的混合整数线性优化模型。该模型建立了配电网可靠性指标(即系统平均停电持续时间指标、系统平均停电频率指标和系统缺供电量)的显式评估表达式,并将其相关的可靠性成本纳入到配电网多级扩展规划目标函数中,以系统运行约束等为约束条件。在24节点、54节点、86节点和138节点四个算例系统上验证了所提出的方法的有效性和适用性。

The traditional distribution network reliability assessment uses simulation of component outages to quantify the impact of a set of events on power supply reliability.This simulation-based reliability assessment method requires heuristic or meta-heuristic methods to be used for its inclusion in distribution network expansion planning.To overcome the shortcomings of convergence and local optimization in heuristic or meta-heuristic methods,this paper proposes a mixed integer linear optimization model for multi-stage expansion planning of distribution networks considering reliability costs.This model establishes an explicit assessment model for distribution network reliability index(i.e.,the system average interruption duration index,the system average interruption frequency index,and expected energy not supplied),and incorporates its related reliability costs into the multi-stage expansion planning objective function of the distribution network,with system operation constraints as constraints.The effectiveness and applicability of the proposed method was verified on four example systems with 24 nodes,54 nodes,86 nodes,and 138 nodes.